About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Architected Structures and Multifunctional Metamaterials
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| Presentation Title |
Engineered Porosity and Lattice Structures for Thermal Management in IN718 Components Manufactured by Laser Powder Bed Fusion |
| Author(s) |
Chelsea O'Donnell, Jessica Buckner, Jack Beuth |
| On-Site Speaker (Planned) |
Chelsea O'Donnell |
| Abstract Scope |
Thermal protection that minimizes heat transfer through thin walls while maintaining structural integrity is essential for aerospace systems at extreme temperatures. In this research, intentional lack-of-fusion (LoF) porosity and engineered lattice structures in laser powder bed fusion (L-PBF) are used to optimize thermal and mechanical performance. Prior work in the literature focuses on minimizing porosity for fatigue, and while lattice structures are well studied, little existing work balances stiffness and conductivity. In engineering LoF porosity, samples were designed by mapping the LoF parameter space. Subsequent CT scans have demonstrated control of pore density, morphology, and orientation to interrupt conductive pathways. Lattice FEA simulations have revealed that heat transfer depends substantially on geometry, in addition to volume fraction. This enables anisotropic designs with enhanced stiffness in one direction and reduced conductivity in at least one remaining normal direction. Both approaches are being applied to aerospace structures with different wall thicknesses. |